CN112640174A - Fuel cell power pack - Google Patents
Fuel cell power pack Download PDFInfo
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- CN112640174A CN112640174A CN201980056074.8A CN201980056074A CN112640174A CN 112640174 A CN112640174 A CN 112640174A CN 201980056074 A CN201980056074 A CN 201980056074A CN 112640174 A CN112640174 A CN 112640174A
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- fuel cell
- housing
- disposed
- power pack
- cell power
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- 239000000446 fuel Substances 0.000 title claims abstract description 126
- 239000007789 gas Substances 0.000 claims description 144
- 238000003780 insertion Methods 0.000 claims description 36
- 230000037431 insertion Effects 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
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- 239000002737 fuel gas Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 52
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 34
- 239000001257 hydrogen Substances 0.000 description 23
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- 238000003825 pressing Methods 0.000 description 19
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- 238000003487 electrochemical reaction Methods 0.000 description 7
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- 229910052782 aluminium Inorganic materials 0.000 description 2
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/10—Propulsion
- B64U50/19—Propulsion using electrically powered motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/30—Supply or distribution of electrical power
- B64U50/32—Supply or distribution of electrical power generated by fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04291—Arrangements for managing water in solid electrolyte fuel cell systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D41/00—Power installations for auxiliary purposes
- B64D2041/005—Fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fuel Cell (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a fuel cell power pack, comprising: a housing; a gas tank disposed in a gas tank mounting/dismounting portion formed in the housing; according to the invention, the weight is reduced by supplying power from the fuel cell, flyers such as an unmanned aerial vehicle can run for a long time, and the whole weight balance is maintained, so that the unmanned aerial vehicle can be stably started even if the unmanned aerial vehicle is installed on the unmanned aerial vehicle, an air conditioner structure is improved to maintain the stable working environment temperature of stacking, the lifting force composition of the unmanned aerial vehicle is contributed, and the convenience of a user is improved through the air supply structure capable of simply disassembling and assembling the air tank.
Description
Technical Field
The present invention relates to a power pack powered by a fuel cell.
Background
The unmanned aerial vehicle is a general name of the unmanned aerial vehicle which is carried by the unmanned aerial vehicle. Unmanned aerial vehicles operated by radio waves were initially used in military applications for air force aircraft, antiaircraft guns or missile missiles.
With the development of wireless technology, the wireless technology is not only used for air defense exercises, but also used for military reconnaissance aircraft and mounting various weapons to destroy target facilities.
Recently, the use degree of the unmanned aerial vehicle is further expanded. Unmanned aerial vehicles are being developed for recreational time, and unmanned aerial vehicle maneuvering conferences have also been developed, whereby it can be seen that unmanned aerial vehicles are becoming increasingly popular. Moreover, the delivery enterprise also plans to execute a delivery mechanism that delivers the requested commodity by using the unmanned aerial vehicle.
With this trend, major enterprises in countries around the world view the unmanned aerial vehicle-related industry as a promising cause and advance to investment activities and technology development.
But in the operation process of unmanned aerial vehicle, the most important factor is whether can operate for a long time. The flight time of most drones used in the current market is not long. Driving multiple propellers operates the drone, but driving the propellers requires a significant amount of electrical power.
Even in this case, if a large-capacity battery or a large number of batteries having a large volume are mounted on the drone in order to increase the flight time, the size and weight of the drone have to be increased due to the size and weight of the batteries, which in turn leads to inefficient results. In particular, in the case of distributing the relevant drone, it is also necessary to consider a payload (payload) value, and therefore, the size and weight reduction of the drone itself is one of the very important elements for the drone, and there is a limit to increase the general battery in the market for long-term operation.
Further, if a large-sized high-capacity battery or a large number of batteries are not separately mounted on the unmanned aerial vehicle, the starting force of the unmanned aerial vehicle is reduced.
Disclosure of Invention
Technical subject
The present invention has been made in an effort to provide a fuel cell power pack that supplies power from a fuel cell, thereby reducing weight, allowing an unmanned aerial vehicle-like flying object to operate for a long time, maintaining the overall weight balance, enabling stable startup of the flying object even when mounted on the unmanned aerial vehicle, improving an air circulation structure to maintain a stable operating environment temperature in a stack, contributing to a lift composition of the flying object, and improving user convenience by an air supply structure that allows easy disassembly and assembly of an air tank.
Means for solving the problems
The present invention for achieving the above object relates to a fuel cell power supply pack including: a housing; a gas tank disposed in a gas tank attachment/detachment portion formed in the housing; and a fuel cell unit disposed inside the housing so as to be weight-balanced with the gas tank.
In an embodiment of the present invention, the fuel cell unit includes: a manifold part connected with a regulating valve, wherein the regulating valve is combined with the gas tank; and a stack portion connected to the manifold portion for receiving the fuel gas.
In the embodiment of the present invention, the manifold portion and the stack portion are disposed in a weight-balanced manner with respect to a second direction (V2) of the housing with reference to a center line (P) of the housing in the first direction (V1).
In an embodiment of the present invention, the manifold portion is disposed on an inner front surface portion of the housing, and the stack portion is disposed in plural numbers at positions symmetrical to each other on both sides of an inside of the housing.
In the embodiment of the present invention, the gas tank and the stack portion are balanced in weight with respect to a second direction (V2) of the housing with reference to a center line (P) of the housing in the first direction (V1).
In an embodiment of the present invention, the stack portion is disposed in plural in the housing.
In the embodiment of the present invention, the gas tank and the plurality of stacks are balanced in weight with respect to a second direction (V2) of the housing, with reference to a center line (P) of the housing in the first direction (V1).
The gas tank is disposed on a first direction (V1) center line (P) of the housing.
In an embodiment of the present invention, the plurality of stacking portions are disposed at positions symmetrical to each other on both side portions of the housing with respect to the gas tank.
In an embodiment of the present invention, the fuel cell system further includes an auxiliary power supply unit disposed inside the housing, connected in parallel to the fuel cell unit in a controlled manner, and configured to supply auxiliary power.
In an embodiment of the present invention, the auxiliary power supply unit is disposed in plural numbers, and is disposed at symmetrical positions with respect to a center line (P) of the case in the first direction (V1).
In the embodiment of the present invention, the plurality of stack portions are disposed inside the housing, and the plurality of stack portions and the plurality of auxiliary power supply portions are balanced in weight with respect to a second direction (V2) of the housing with respect to a center line (P) of the housing in a first direction (V1).
In addition, in an embodiment of the present invention, the air conditioner further includes a drain part formed in an inner lower surface portion of the casing, and condensed water discharged from the stack part or condensed water generated by condensation of outside air in the casing is collected and discharged.
In an embodiment of the present invention, the discharge unit includes: a drainage groove formed by the concave of the lower surface of the inner side of the shell; a first drain pipe connected to a lower portion of the stack portion and disposed in the drain tank to drain condensed water discharged from the stack portion to the outside; and a second drain pipe disposed in the drain tank, for discharging condensed water generated by condensation of external air in the casing to the outside.
In an embodiment of the present invention, the discharge unit includes: a drainage groove formed by the concave of the lower surface of the inner side of the shell; and a drain port disposed in the drain groove, and having a slit hole formed therein, so that condensed water polymerized in the drain groove is condensed and discharged.
In an embodiment of the present invention, the drain unit includes a humidifying unit disposed in the drain groove, and the humidifying unit evaporates the condensed water condensed in the drain groove to form a humidified atmosphere in the casing.
In an embodiment of the present invention, the humidification unit is a heating coil, an ultrasonic humidification sensor, or a natural convection humidifier.
In an embodiment of the present invention, the gas tank attachment/detachment unit includes: an insertion hole formed in a rear surface portion of the housing for inserting the gas tank; and a fixing member disposed around the insertion hole for fixing the gas tank.
In an embodiment of the present invention, the fixing member includes: a block fixed to an inner surface of the housing and having a moving groove formed therein; a moving block which forms a guide rod inserted into the moving groove and is connected with the block body; a fixed rod connected with the movable block through a connecting rod and assembled and disassembled in an insertion groove of the gas tank; and a coil spring disposed between an inner surface of the block and an inner space of the guide rod.
In an embodiment of the present invention, the fixing member includes: a guide groove formed in the block; and a guide projection disposed on the moving block and inserted into the guide groove.
In an embodiment of the present invention, the fixing member includes: a fixing bolt disposed on the block; and a fixing groove configured on the moving block and used for inserting the end part of the fixing bolt.
Effects of the invention
The invention is a power pack driven by a fuel cell, and compared with a common battery suitable for an unmanned aerial vehicle in the market, the power pack has more excellent output, thereby realizing long-time operation of the unmanned aerial vehicle and increasing the effective load value of the unmanned aerial vehicle.
Also, in the present invention, the housing is designed in a streamline type, so that air resistance generated according to various directions of driving of the drone can be minimized.
Further, in the present invention, the hydrogen tank is disposed on the center side of the housing, and a plurality of stacks are disposed in the housing at symmetrical positions along both sides of the hydrogen tank to achieve weight balance, thereby enabling stable startup operation of the drone.
In the present invention, a hydrogen tank insertion port is disposed on the rear side of the housing, a fixing member to which the hydrogen tank is fixed is disposed in the hydrogen tank insertion port, and a pressurization type manifold (pilot) block is disposed inside the front side of the housing. Thus, when the hydrogen tank is inserted into the housing, the hydrogen tank is in a pressurized state, and the regulating valve (regulator valve) of the hydrogen tank is stably coupled to the manifold block, thereby blocking leakage during the supply of hydrogen gas. Further, in the case of separating the hydrogen tank, when the fixing member is separated, a repulsive force in a pressurized state is generated, so that the hydrogen tank can be rapidly separated from the hydrogen tank inlet. This allows simple replacement of the hydrogen tank and the use of other hydrogen containers of different lengths.
In the present invention, an electronically controlled flow control valve such as an electromagnetic valve (solenoid valve) is disposed in the manifold block to control the flow rate of the hydrogen gas supplied to the stack, so that the fuel cell can be opened and closed at a point of time required by a user, and the operation of the fuel cell can be interrupted in an emergency.
In the present invention, the user simply inserts the regulator valve connected to the hydrogen tank into the manifold block, and the opening/closing rod disposed inside the regulator valve presses the pressing portion formed inside the manifold block, thereby communicating the gas flow path, and improving the ease of operation.
In the present invention, the gas supply pipe branched at the manifold block is connected to the upper end of the stack, and when condensed water generated by an electrochemical reaction between hydrogen and air moves downward by gravity, inflow of hydrogen supplied to the stack at the gas supply pipe is not hindered, thereby increasing chemical reaction efficiency in the stack.
In the present invention, a concave drain groove is formed in a portion of the lower end surface of the housing, so that condensed water generated in the housing is collected at one location and drained, and the structural rigidity of the housing is improved. This can maintain the inside of the case in a relatively clean state, preventing the control device such as a circuit board from being exposed to the condensed water. Of course, the control device may be insulated or waterproofed.
In the present invention, the drain tank is provided with a heating coil, an ultrasonic humidification sensor, or a natural convection humidifier, and condensed water collected in the drain tank is evaporated to form a humidified environment for the operation of stacking, thereby promoting the electrochemical reaction in the stack to improve the efficiency of the fuel cell.
In addition, in the present invention, an auxiliary battery such as a lithium ion battery is provided and supplies power in parallel with the fuel cell, whereby power can be stably supplied to the unmanned aerial vehicle. In this case, in consideration of weight balance, the auxiliary battery is disposed at a plurality of positions symmetrical to each other on both sides of the inside of the housing with the hydrogen tank as a center, and even if one auxiliary battery is fixed, the remaining auxiliary batteries can stably start the drone.
In the present invention, the air inlet is disposed on each of the front, rear, and lower ends of the casing, the air outlet is disposed on each of both sides of the casing, the fan is disposed on the air outlet, the fan is driven, and the air flowing in through the front, rear, and lower ends of the casing is stacked. The controller for controlling the fuel cell adjusts the flow rate of air supplied to the stack by controlling the rotation speed of the fan motor, and thus, efficient operation of the fuel cell based on the working environment and conditions can be achieved.
In the present invention, the circuit board is disposed at the air inlet, and the heated circuit board is naturally cooled by the outside air during operation, thereby improving the cooling effect of the circuit board.
Further, in the present invention, by forming the hermetic cover between the stack and the air inlet and forming the recirculation passage in the hermetic cover, a part of the stacked air is recirculated to the inside of the casing through the recirculation passage, and thus, a rapid change in the temperature of the stacked working environment due to the outside air temperature can be prevented. In this case, an electronically controllable valve is disposed in the recirculation flow path to adjust the amount of recirculated air, whereby the internal temperature of the casing can be maintained at the optimum temperature of the fuel cell.
In addition, in the present invention, a plurality of louvers are disposed at the air inlet, and the louvers are disposed to be inclined downward, and the louvers contribute to the lifting force of the unmanned aerial vehicle in comparison with the air flow direction of the propeller of the unmanned aerial vehicle, thereby preventing rainwater or moisture from flowing into the system in snow and rain.
In addition, in the present invention, a handle is disposed on the hydrogen tank to easily control the hydrogen tank, and a lead (lid) in the form of a translucent glass is disposed on the upper portion of the housing, so that the internal operation and recognition can be easily performed during maintenance, thereby achieving user convenience.
Drawings
Fig. 1 is a top view of a fuel cell power pack of the present invention.
Fig. 2 is a front view of a fuel cell power pack of the present invention.
Fig. 3 is a side view of a fuel cell power pack of the present invention.
Fig. 4 is a rear view of the fuel cell power pack of the present invention.
Fig. 5 is a bottom plan view of a fuel cell power pack of the present invention.
Fig. 6 is a perspective view of a fuel cell power pack of the present invention.
Fig. 7 is a perspective view showing a fuel cell power pack of the present invention.
Fig. 8 is a side perspective view showing a fuel cell power pack of the present invention.
Fig. 9 is a side perspective view showing the inside of the fuel cell power pack of the present invention.
Fig. 10 is a plan view showing the structure of the fixing member of the present invention.
Fig. 11 is a side view showing the structure of a fixing member of the present invention.
Fig. 12 is a perspective view showing the structure of the fixing member of the present invention.
Fig. 13 is a cross-sectional view E-E shown in fig. 10.
Fig. 14a is a schematic cross-sectional view showing a first embodiment of the discharge part of the present invention.
Fig. 14b is a schematic cross-sectional view showing a second embodiment of the discharge part of the present invention.
Fig. 15a is a schematic cross-sectional view showing a third embodiment of the discharge part of the present invention.
Fig. 15b is a schematic cross-sectional view showing a fourth embodiment of the discharge part of the present invention.
Fig. 16 is a front view showing an air circulation structure in the fuel cell power pack of the present invention.
Fig. 17 is a sectional view of part B-B shown in fig. 2.
Fig. 18a is a sectional view of the portion a-a shown in fig. 1.
Fig. 18b is an enlarged view of the portion M shown in fig. 18.
Fig. 19a is a partial sectional view showing another embodiment of the air circulation structure of the fuel cell power pack of the present invention.
Fig. 19b is an enlarged view of the portion M shown in fig. 19 a.
Fig. 20a is a partial sectional view showing still another embodiment of the air circulation structure of the fuel cell power pack of the present invention.
Fig. 20b is an enlarged view of the portion L shown in fig. 20 a.
Fig. 21 is a plan view showing an air supply structure in the fuel cell power pack of the present invention.
Fig. 22 is an enlarged view of the portion N shown in fig. 20.
Fig. 23 is a perspective view showing a first embodiment of the structure of the pressurizing unit of the present invention.
Fig. 24a is a perspective view showing an aspect of the second embodiment of the pressing unit structure of the present invention.
Fig. 24b is a perspective view showing another aspect of the second embodiment of the pressing unit structure of the present invention.
Fig. 25 is a sectional view showing the structure of the air supply unit of the present invention.
Fig. 26 is an enlarged view of a portion H shown in fig. 24.
Fig. 27 is a sectional view showing the arrangement structure of the flow control valve of the present invention.
Fig. 28 is a plan view of another embodiment of the fuel cell power pack according to the present invention.
Fig. 29 is a front view of another aspect of the fuel cell power pack of the present invention.
Fig. 30 is a side view of another aspect of the fuel cell power pack of the present invention.
Fig. 31 is a rear view of another aspect of the fuel cell power pack of the present invention.
Fig. 32 is a bottom view of another embodiment of the fuel cell power pack of the present invention.
Fig. 33 is a perspective view of another embodiment of the fuel cell power pack of the present invention.
Detailed Description
Hereinafter, preferred embodiments of various configurations of the fuel cell power pack according to the present invention will be described in detail with reference to the drawings.
[ Fuel cell Power Module ]
Fig. 1 is a top view of a fuel cell power pack 100 of the present invention. Fig. 2 is a front view of the fuel cell power pack 100 of the present invention. Fig. 3 is a side view of the fuel cell power pack 100 of the present invention. Fig. 4 is a rear view of the fuel cell power pack 100 of the present invention. Fig. 5 is a bottom plan view of the fuel cell power pack 100 of the present invention. Fig. 6 is a perspective view of a fuel cell power pack 100 according to the present invention. Fig. 7 is a perspective view showing a fuel cell power pack 100 of the present invention. Fig. 8 is a side perspective view showing a fuel cell power pack 100 of the present invention. Fig. 9 is a side perspective view showing the inside of the fuel cell power pack 100 of the present invention. Fig. 10 is a plan view showing the structure of the fixing member 250 of the present invention. Fig. 11 is a side view showing the structure of the fixing member 250 of the present invention. Fig. 12 is a perspective view showing the structure of the fixing member 250 of the present invention. Fig. 13 is a cross-sectional view E-E shown in fig. 10. Fig. 14a is a schematic cross-sectional view showing a first embodiment of the discharge part 600 of the present invention. Fig. 14b is a schematic cross-sectional view showing a second embodiment of the discharge part of the present invention. Fig. 15a is a schematic cross-sectional view showing a third embodiment of the discharge part of the present invention. Fig. 15b is a schematic cross-sectional view showing a fourth embodiment of the discharge part of the present invention.
Referring to fig. 1 to 9, fuel cell power pack 100 of the present invention may include a case 200, a gas tank 300, and a fuel cell portion 400. The fuel cell power pack 100 of the present invention is mounted to a flying object such as an unmanned aerial vehicle to supply power. Of course, the device is installed as a device that can supply power to various devices in addition to the flight object.
The housing 200 is mounted to the drone during flight and is contoured to minimize air impedance. In addition, materials such as plastic, carbon, titanium, and aluminum may be used for the purpose of reducing the weight.
A lead 204 may be disposed on the upper portion of the housing 200. A lead handle 205 is formed on the lead 204, and a user holds the lead handle 205 to open the lead 204 and maintain various components disposed inside the case 200.
An antenna hole 206 may be disposed on an upper side of the housing 200. The antenna hole 206 is a portion of the wireless terminal held by the user, from which the communication antenna protrudes outward.
Next, the gas tank attachment/detachment portion 210 may be disposed on the rear surface 203 of the housing 200. The gas tank attachment/detachment section 210 may be provided with an insertion port 211 corresponding to the outer shape of the gas tank 300 and a fixing member 250 for fixing the gas tank 300.
A tank handle 301 for allowing a user to simply control the gas tank 300 may be disposed at the rear end of the gas tank 300, and an insertion groove 302 for attaching and detaching the fixing member 250 may be disposed on the side surface of the gas tank 300. The gas filled in the gas tank 300 may be hydrogen gas. But, not limited thereto, other fuel gas may be used according to the technical development.
Referring to fig. 10 to 13 and 33, the fixing member 250 may include a block 251, a fixing rod 260, a moving block 255, a coil spring 265, a guide groove 253, a guide protrusion 257, a fixing bolt 262, and a fixing groove 263.
The block 251 is adjacent to the insertion port 211 and is bolt-coupled to the inner surface of the housing 200 by a fixing bracket 267. A moving groove 252 having a circular cross section may be formed in the block 251 along the insertion groove 302 of the gas tank 300.
A cylindrical guide rod 256 inserted into the moving groove 252 may be formed in the moving block 255, and the guide rod 256 may be inserted into the moving groove 252 to connect the moving block 255 and the fixed block 251 and move the moving block 255 in the direction of the insertion groove 302.
The fixed rod 260 connects the moving block 255 and the plurality of connecting rods 258, and is inserted into or separated from the insertion groove 302 of the gas tank 300 as the moving block 255 moves.
The coil spring 265 may be disposed between an inner surface of the block 251 and an inner space of the guide rod 256. The coil spring 265 provides an elastic force to the guide rod 256 to clamp the fixing rod 260 to the insertion groove 302 of the gas tank 300.
Next, a guide groove 253 may be formed in the block 251 along the moving direction of the moving block 255. A guide protrusion 257 disposed in the guide groove 253 may be formed in the moving block 255, and the guide protrusion 257 is inserted into the guide groove 253 and moved, so that the moving direction of the fixing lever 260 is guided to the insertion groove 302.
The fixing bolt 262 may be disposed on a protruding portion of the block 251. The fixing groove 263 is disposed in the moving block 255 and is inserted into the end 262a of the fixing bolt 262.
The user pulls the fixing lever 260 in a direction opposite to the insertion groove 302, and rotates the fixing bolt 262, so that the end 262a of the fixing bolt 262 is inserted into the fixing groove 263, and the position of the fixing lever 260 is fixed without being moved in the direction of the insertion groove 302 by the elastic force of the coil spring 265.
When gas tank 300 is attached to or detached from insertion port 211, the user can easily separate or attach gas tank 300 without interference from fixing rod 260.
Referring again to fig. 1 to 9, the rear surface 203 of the housing 200 may be provided with a power switch 820 which is disposed inside the housing 200 and operates the fuel cell unit 400. The user clicks on the power switch 820 to determine whether to operate the fuel cell power pack 100.
Further, a fuel state display window 810 may be provided which is connected to the gas tank 300 and displays the remaining amount of gas in the gas tank 300. The user recognizes the color of the fuel status display window 810 to confirm the remaining amount of gas. The fuel status display window 810 may be in the form of an indicator Light (LED), but is not limited thereto.
For example, the gas remaining amount may be a sufficient state of 80 to 100% in the case of cyan or green, an intermediate state of 40 to 70% in the case of yellow, and an insufficient state of 0 to 30% in the case of red, and the gas needs to be filled. Still other settings may exist.
A front window 221 may be disposed in the front surface 201 of the housing 200, and the front window 221 may be an air inlet 220 through which external air flows into the housing 200. In this case, a plurality of rows of louvers are formed in the front window 221, and thus, a relatively large volume of foreign matter is prevented from flowing into the housing 200.
Referring to fig. 31, in another embodiment, the air inlet 220 is disposed on the housing 200 together with the front window 221 and in the form of rear windows 224 on both side portions of the gas tank 300. The air inlet 220 may be disposed at a plurality of positions on the housing 200, and the position of the air inlet is not limited to the housing 200.
An air outlet 230 having a plurality of louvers is disposed on the side surface 202 of the housing 200, and air introduced through the air inlet 220 circulates through the housing 200 and is then discharged to the outside through the air outlet 230.
Next, the fuel cell part 400 may be formed in the interior of the housing 200 to be balanced in weight with the gas tank 300. The fuel cell power pack 100 according to the present invention is mounted on an object to be flown, such as an unmanned aerial vehicle, and thus, the housing 20, the gas tank 300, and the fuel cell unit 400 are formed to have a uniform overall weight so as not to receive the starting force of the unmanned aerial vehicle.
Such the above-described fuel cell part 400 may include a manifold part 420 and a stack part 410. First, the manifold portion 420 may be a portion connected to the regulating valve 320 combined with the gas tank 300. Also, the stack portion 410 may be connected to the manifold portion 420, and may receive gas from the manifold portion 420.
Referring to fig. 9, the manifold portion 420 and the stack portion 410 form a weight balance with respect to a center line P of the case 200 in the first direction V1 with respect to the second direction V2 of the case 200.
Specifically, the manifold portion 420 may be disposed at the inner front portion 201 of the housing 200, and the stack portion 410 may be disposed in plural numbers, and may be disposed at symmetrical positions at both sides of the interior of the housing 200.
When a plurality of stack units 410 are arranged, the gas tank 300 and the plurality of stack units 410 are balanced in weight with respect to the second direction V2 of the housing 200, that is, both sides, with reference to the center line P of the housing 200 in the first direction V1.
Specifically, in the embodiment of the present invention, gas tank 300 is disposed on center line P of outer shell 200 in first direction V1, and plurality of stacks 410 are symmetrical with respect to gas tank 300 on both sides of inner portion of outer shell 200.
That is, gas tank 300 is disposed in the center of housing 200, and two stack portions 410 are formed, and as shown in fig. 9, gas tank 300 is disposed at the same position on both sides. Thus, the fuel cell power pack 100 of the present invention has a weight balance along the second direction V2 with respect to the center line P of the first direction V1.
When the fuel cell power pack 100 is mounted to the drone, the configuration taking into account such weight balance minimizes the fluctuation of the weight center of the drone to reduce the influence on the start-up of the drone.
Next, the auxiliary power supply unit 500 is disposed inside the housing 200, and the fuel cell units 400 are connected in parallel to supply power to the drone.
That is, the fuel cell part 400 and the auxiliary power supply part 500 are connected in parallel to the control board 830, so that power can be selectively supplied to the drone.
First, in the stack portion 410 constituting the fuel cell portion 400, power generated during a chemical reaction between oxygen and hydrogen is supplied to the drone, so that the drone operates.
When an output greater than the output produced in the stack unit 410 is required according to the flight and mission execution environment of the unmanned aerial vehicle, the auxiliary power supply unit 500 supplies the insufficient output in parallel.
For example, in another situation, when an emergency event occurs in which production is interrupted due to the stack portion 410 being damaged, the auxiliary power supply portion 500 supplies emergency power to prevent the operation of the unmanned aerial vehicle from being stopped during flight.
In this case, the plurality of auxiliary power supply units 500 may be arranged at positions symmetrical to each other in the front surface 201 of the housing 200 with respect to the center line P of the housing 200 in the first direction V1 so as to provide a weight balance without hindering the start of the flying object.
In the embodiment of the present invention, the auxiliary power supply unit 500 is formed in plurality, and in this case, the stack unit 410 constituting the fuel cell unit 400 is also formed in plurality, and the plurality of stack units 410 and the plurality of auxiliary power supply units 500 are disposed in the housing 200 at positions symmetrical to each other with respect to the center line P of the housing 200 in the first direction V1.
Referring to fig. 9 again, in the embodiment of the present invention, the stack portion 410 and the auxiliary power supply portion 500 are formed in two, and are disposed at symmetrical positions with respect to a center line P of the first direction V1 in the housing 200 to form a weight balance.
On the other hand, the gas tank 300, the manifold portion 420, and the control plate 830 are disposed on the first direction V1 center line P. Along the center line P of the first direction V1, a weight balance is formed between the front face 201 of the housing 200 and the rear face 203 of the housing 200.
That is, the stack unit 410 and the auxiliary power supply unit 500 are disposed at symmetrical positions on both sides of a first direction V1 center line P in the interior of the housing 200 to provide a weight balance, and the gas tank 300, the manifold unit 420, and the control plate 830 are disposed at the first direction V1 center line P in the interior of the housing 200 to provide a weight balance between the front surface 201 of the housing 200 and the rear surface 203 of the housing 200.
As a whole, the stack unit 410, the auxiliary power supply unit 500, the gas tank 300, the manifold unit 420, and the control board 830 are all weight-balanced in the first direction V1 and the second direction V2 within the housing 200, and thus even when the fuel cell power pack 100 is mounted on an unmanned aerial vehicle, the weight balance of the unmanned aerial vehicle is maintained without being inclined to one side.
This kind of weight balance of above-mentioned constitutional element disposes the influence minimizing of unmanned aerial vehicle's start-up environment and contributes unmanned aerial vehicle's smooth start-up.
Next, referring to fig. 14a and 14b, the drain 600 is formed on the lower surface of the inside of the casing 200, and is a portion where the condensed water discharged from the stack 410 or condensed water generated by condensation of the outside air inside the casing 200 is collected and discharged.
Such a drain 600 may include a drain channel 610, a first drain pipe 620, and a second drain pipe 630.
The drain groove 610 is formed in a concave manner at an inner lower surface portion of the case 200 in such a manner as to collect condensed water. Referring to fig. 2 and 5, in the embodiment of the present invention, two stacks 410 are formed on both sides of the front surface 201 of the housing 200, and are disposed inside the housing 200.
The first drain pipe 620 is connected to a lower portion of the stack portion 410, is disposed in the drain groove 610, and discharges the condensed water discharged from the stack portion 410 to the outside. In the stack portion 410, condensed water generated by the electrochemical reaction between oxygen and hydrogen is discharged to the outside through the first drain pipe 620.
The second drain pipe 630 is disposed in the drain tank 610, and drains condensed water generated by condensation of external air to the outside in the case 200.
Referring again to fig. 14a and 14b, the drain 600 further includes a humidifying unit 640 disposed in the drain 610, and configured to evaporate the condensed water collected in the drain 610 to form a humidified environment in the casing 200.
Generally, the stack of fuel cells is further promoted in a humidified environment as compared with a dry environment by the electrochemical reaction of oxygen and hydrogen, so that the power generation efficiency of the fuel cells can be improved.
Therefore, the humidifying unit 640 is disposed in the drain tank 610 to evaporate condensed water again, thereby forming a humidified environment in which electrochemical reactions are promoted in the stack 410, and thus contributing to improvement of power generation efficiency of the stack 410.
In an embodiment of the present invention, as shown in fig. 14a, the humidifying unit 640 may be in the form of a heating coil. The drain tank 610 may be provided with a heating coil, and the condensed water collected in the drain tank 610 receives heat from the heating coil and evaporates, thereby forming a humidified environment. In this case, the control of the heating coil may be performed in the control board 830, and the power supplied to the heating coil may be received from the stack unit 410 or the auxiliary power supply unit 500.
In another embodiment of the present invention, as shown in fig. 14b, the humidifying unit 640 may be an ultrasonic humidifying sensor. The drain tank 610 may be provided with an ultrasonic humidification sensor, and the condensed water collected in the drain tank 610 is increased by vibration due to ultrasonic waves, so that the inside of the case 200 can be formed into a humidified environment. The control of the ultrasonic humidification sensors may be performed by the control board 830, and the power supplied to the ultrasonic humidification sensors may be supplied to the stack unit 410 or the auxiliary power supply unit 500.
Although not shown, another embodiment of the humidifying unit 640 may be a natural convection humidifier.
On the other hand, referring to fig. 15a, 15b and 32, in another embodiment of the present invention, the discharge portion 600 may include a drain port 650 having a different shape. First, the humidifying unit 640 is arranged in the same manner, and a slit hole 653 is formed in the drain port 650. The condensed water gathered in the drain groove 610 is discharged to the outside through the slit hole 653, and at this time, the slit hole 653 forms a cross-shaped slit, and the condensed water is not discharged rapidly at a time, but is gradually collected in the slit hole 653 and discharged. This is designed to ensure the time for the humidifying unit 640 to evaporate the condensed water to form a humidifying environment.
The drain port 650 may be formed of a rigid material such as plastic or metal, and on the contrary, the drain port 650 may be formed of a soft material such as rubber or silicon, in which case a structure for discharging condensed water with an additional drain pipe interposed therebetween may be changed.
[ air circulation Structure of Fuel cell Power Package ]
Fig. 16 is a front view showing an air circulation structure in the fuel cell power pack of the present invention. Fig. 17 is a sectional view of part B-B shown in fig. 2. Fig. 18a is a sectional view of the portion a-a shown in fig. 1. Fig. 18b is an enlarged view of the portion M shown in fig. 18.
Referring to fig. 16 to 18b, the air circulation structure of the fuel cell power pack 100 of the present invention may include an air inlet 220, an air outlet 230, and a flow guiding unit 700. The air inlet 220, the air outlet 230, and the flow guide unit 700 may be disposed in the housing 200 of the fuel cell power pack 100.
The air inlet 220 may be disposed in the front surface 201 of the housing 200, and may be a portion into which external air flows. In the present invention, the front window 221 in which a plurality of louvers are disposed in the front surface 201 of the housing 200 may be the air inlet 220. However, as described above, the position of the air inflow port 220 is not limited at the upper portion of the case 200.
In this case, the control plate 830 is disposed above the air inlet 220 in the housing 200, and can be cooled by the air flowing in the air inlet 220. That is, when the fuel cell is operated, the circuit disposed in the control board 830 is heated, and at this time, it is naturally cooled by the flow of air flowing from the outside.
Next, the air outlet 230 may be a portion that is separated from the air inlet 220 in the case 200 and discharges the air flowing into the case 200. In this case, the air outlet 230 may be adjacent to the stack portion 410.
In the present invention, gas tank 300 is disposed on the center side of outer shell 200, and stack 410 is disposed on both sides of gas tank 300. Therefore, the air outlet 230 is disposed adjacent to the stack portion 410 on the side surface portion 202 of the housing 200.
Accordingly, the air flowing in through the air inlet 220 passes through the stack 410, is guided in the flow direction by the flow guide unit 700, and is discharged to the air outlet 230.
Next, the flow guide unit 700 connects the stack portion 410 and the air outlet 230 to guide the flow of air inside the case 200.
Such the above-described flow guide unit 700 may include a sealing cover 710, a fan unit 730, a recirculation flow path 720, and a louver 740.
The sealing cover 710 seals the periphery of one surface of the stack portion 410 and the inner side surface 202 of the housing 200, which is the outer peripheral portion of the air outlet 230, so that the air passing through the stack portion 410 flows in the direction of the air outlet 230.
In this case, the sealing cover 710 may be formed of a plurality of plates to surround the periphery of one surface of the stack portion 410 and the inner side surface 202 of the housing 200 in four directions to form a sealed space.
With such a sealed space, the air passing through the stack portion 410 flows only in the direction of the air outlet 230.
Next, the fan member 730 may be disposed at the air outlet 230. In the present invention, when the fan unit 730 is operated, the air inside the casing 200 moves to the outside, and the inside of the casing 200 is in a relatively low pressure state or a negative pressure state compared to the outside environment.
When the inside of the case 200 is relatively low pressure or negative pressure, external air flows into the inside of the case 200 through the air inlet 220 due to the pressure difference. That is, in the present invention, the fan unit 730 is operated to forcibly form an air circulation environment inside the housing.
Since the fan member 730 is disposed in a space formed by the air outlet 230, the sealing cover 710, and the stack portion 410, air flowing into the air inlet 220 is forcibly passed through the stack portion 410 by discharging air based on the operation of the fan member 730 to form an air flowing environment.
The user controls the rotation speed of the fan unit 730 through the controller, and adjusts the amount of air flowing into the inside of the case 200 by the pressure difference. As a result, the output of the stack portion 410 is controlled by adjusting the amount of air supplied to the stack portion 410.
On the other hand, if the fuel cell is operated stably with high efficiency, the operating environment of the fuel cell stack needs to be maintained optimally. Especially, operational environment's temperature is the important factor, and according to the external environment temperature of unmanned aerial vehicle application, the operational environment temperature that fuel cell piles up receives the influence.
For example, in the case where the drone is activated in a cold area such as siberia, north pole, south pole, etc., the temperature difference between the outside and the inside of the housing 200 is large, and the inside temperature of the housing 200 is lowered by the outside air temperature.
That is, the operating environment temperature of the stack portion 410 disposed inside the housing 200 cannot be maintained at an appropriate temperature. In this case, the internal temperature of the housing 200 needs to be raised to an appropriate temperature.
In contrast, in the case of starting the drone in a hot area such as africa, the middle east, a desert, etc., the temperature difference between the outside and the inside of the housing 200 is great, and the inside temperature of the housing 200 is heated due to the outside air temperature.
That is, the operating environment temperature of the stack portion 410 disposed inside the housing 200 cannot be maintained at an appropriate temperature. In this case, it is necessary to lower the internal temperature of the housing 200 to an appropriate temperature.
Therefore, in order to prevent the outside environment temperature in which the unmanned aerial vehicle operates from rapidly changing, the operating environment temperature of the stack portion 410 may be provided with a recirculation flow path 720 in the hermetic enclosure 710, as shown in fig. 16 and 18 a.
After passing through the stack portion 410, a part of the air remaining in the sealing cover 710 passes through the recirculation passage 720 and bypasses and recirculates into the casing 200.
Since the air passing through the stack portion 410 is air cooled by air cooling and maintains a temperature similar to that of the stack portion 410, if a part of the air remaining in the stack portion 410 is recirculated inside the housing 200, the internal temperature of the housing 200 can be adjusted similarly to the operating environment temperature of the stack portion 410.
In the case where the unmanned aerial vehicle is started in a cold area, the internal temperature of the housing 200 may be increased to the operating environment temperature of the stack portion 410, and in the case where the unmanned aerial vehicle is started in a hot area, the internal temperature of the housing 200 may be decreased to the operating environment temperature of the stack portion 410.
That is, the operation efficiency of the stack portion 410 is improved by adjusting the internal temperature of the case 200 to the operating environment temperature of the stack portion 410.
Referring again to fig. 16 and 18a, the flow guiding unit 700 may further include a recirculation control mechanism 722. The recirculation control mechanism 722 may be disposed in the recirculation flow path 720, so as to control the flow rate of the recirculated air.
The recirculation control mechanism 722 may be an electronically controlled slide type on-off valve or a butterfly type on-off valve, but is not limited thereto.
The user can adjust the degree of opening and closing of the recirculation control mechanism 722 using the controller.
In the case where the outside air temperature is similar to the operating environment temperature of the stack portion 410 and thus the internal temperature of the housing 200 does not need to be adjusted, the user turns off the recirculation control mechanism 722, so that all the air remaining inside the hermetic enclosure 710 is discharged to the outside through the air outlet port 230.
In this case, as will be described below, the louver 740 according to the present invention is disposed to be inclined downward, and thus, when all the air in the sealing cover 710 is discharged to the air outlet 230, it can contribute to the lift component of the flying object.
On the other hand, if the difference between the outside air temperature and the operating environment temperature of the stack portion 410 is large and the internal temperature of the housing 200 needs to be quickly matched to the operating environment temperature of the stack portion 410, the user completely opens the recirculation control mechanism 722 by using the controller.
At this time, since a large amount of air flows into the housing 200 in the sealing cover 710, the internal temperature of the housing 200 can be quickly adjusted to the operating environment temperature of the stack portion 410.
Next, referring to fig. 18b, the louver 740 is disposed at the air outlet 230 to guide the flowing direction of the air flowing out. In the present invention, the louver 740 may be inclined downward such that the air discharged from the air outlet 230 flows downward, in the louver 740.
The fuel cell power pack 100 of the present invention may be disposed on the upper or lower portion of the drone. In the case of the propeller-driven type unmanned aerial vehicle, since the unmanned aerial vehicle is raised by the generation of the lift force due to the rotation of the propeller, if the tilt direction of the louver 740 is set to be downward, the flow direction of the air flowing downward discharged from the air outlet port 230 is the same as the flow direction of the air flowing downward through the propeller T of the unmanned aerial vehicle, thereby contributing to the lift force component of the unmanned aerial vehicle.
In order for the air passing through the louver 740 to contribute to the lift of the propeller T type drone, the tilt angle θ 1 of the louver 740 is tilted downward by 10 ° to 80 °, preferably, about 60 °, with respect to the horizontal line.
The plurality of louvers 740 may be disposed at the air outlet 230, and the length of the plurality of louvers 740 may be reduced as the air outlet 230 is closer to the lower side from the upper side.
Referring to fig. 18b, the air outlet 230 is inclined toward the inside of the case 200 from the lower side of the case 200.
At this time, the length of the louver 740 is reduced as the air outlet 230 is closer to the lower side from the upper side, and the air flowing out flows downward.
The length of the louver 740 is reduced by a predetermined ratio, which corresponds to a ratio angle θ 2 by which the air outlet 230 is reduced from the upper side to the lower side.
As the length of the louvers 740 is reduced by a predetermined ratio, the air flow passing through the louvers 740 arranged in a plurality of rows is relatively uniform.
Since the air flows downward, lower louver 742 disposed at the lower portion is shorter than upper louver 741 disposed at the upper portion, and is not hindered by the downward flow.
In the case where the length of the louver 740 is not necessarily reduced but is reduced individually, for example, unlike the case shown in fig. 18b, when one lower louver 742 is longer than the upper louver 741 disposed at the upper portion, the lower louver 742 disposed at the lower portion acts as an obstacle in the course of the air passing through the upper louver 741 flowing downward, and mixes with the air discharged along the lower louver 742, thereby generating turbulence at the periphery of the air outlet 230. This causes the air not to be smoothly discharged but may interfere with the start-up of the drone.
Therefore, it is preferable that the length of the louver 740 is maintained at a predetermined ratio, which is advantageous for the start-up environment of the unmanned aerial vehicle, such as smooth downward discharge of air and formation of an air lift.
That is, the downward inclination angle θ 1 of the louver 740 and the length change of the predetermined proportional angle θ 2 of the louver 740 act together, and the air flowing out is strongly discharged downward. The above-mentioned overlapping structure contributes to the starting environment of the unmanned aerial vehicle as composed of the lift.
Fig. 16 shows the air flow of the air circulation structure of the fuel cell power pack 100.
First, when the user operates the fan unit 730, the air inside the casing 200 moves to the air outlet 23, and the inside of the casing 200 is in a low pressure state or a negative pressure state compared to the outside.
Accordingly, external air flows in due to a pressure difference through the front window 221 disposed at the front surface portion 201 of the housing 200, and the flowing air naturally cools the control plate 830 disposed at the upper portion inside the front surface portion 201 of the housing 200, and circulates and flows into the housing 200.
As shown in fig. 16, the air circulating inside the case 200 passes through one surface of the stack portion 410, and flows in the direction of the hermetic cover 710 in the stack portion 410 by generating electricity through an electrochemical reaction with hydrogen gas or by air-cooling the stack portion 410.
The air flowing into the hermetic cover 710 passes through the fan unit 730 and is discharged to the outside through the air outlet 230.
At this time, in order to appropriately maintain the operating environment temperature of the stack portion 410 according to the external environment, the user sets the degree of opening and closing of the recirculation control mechanism 722 by a controller, thereby adjusting the flow rate of air circulating through the recirculation flow path 720 into the interior of the housing 200.
A portion of the air passing through the recirculation flow path 720 is recirculated inside the casing 200, and maintains a temperature relatively similar to the operating environment temperature of the stack portion 410.
The output efficiency of the stack portion 410 is improved by appropriately maintaining the operating ambient temperature and the humidification conditions of the stack portion 410 together with the humidification unit 640 described above.
Next, another embodiment of the air circulation structure of the fuel cell power pack according to the present invention will be described with reference to fig. 19a and 19b, and fig. 20a and 20 b.
Fig. 19a is a partial sectional view showing another embodiment of the air circulation structure of the fuel cell power pack of the present invention. Fig. 19b is an enlarged view of the portion M shown in fig. 19 a.
Fig. 20a is a partial sectional view showing still another embodiment of the air circulation structure of the fuel cell power pack according to the present invention. Fig. 20b is an enlarged view of the portion L shown in fig. 20 a.
Referring first to fig. 19a and 19b, another embodiment of the air circulation structure for the fuel cell power pack 100 of the present invention may include an air inlet 220, an air outlet 230, and a flow guiding unit 700. The air inlet 220, the air outlet 230, and the flow guide unit 700 may be disposed in the housing 200 of the fuel cell power pack 100.
The description of the air inflow port 220 and the air outflow port 230 is the same, and thus the description thereof will be omitted.
In the present invention, the module frame 900 may be disposed inside the housing 200. The module frame 900 may be an additional component mounted inside the housing 200 or may be a part of the housing 200.
A tank housing portion 910 may be formed at the center of the module frame 900, and the gas tank 300 may be disposed. In addition, stack receiving portions 920 are formed at both side portions of the module frame 900, and the side portion 202 of the housing 200 is disposed.
The stack portion 410 is disposed in an inclined manner by the first coupling means 922 and the second coupling means 924 on the first receiving surface 921 and the second receiving surface 923, respectively, of the stack receiving portion 920.
The air flows in the air inlet 220, passes through the stack 410, is guided in the flow direction by the flow guide unit 700, and is discharged to the air outlet 230.
Next, the flow guide unit 700 is connected to the stack portion 410 and the air outlet 230, and the flow of the air flowing in the direction of the air outlet 230 is adjusted by the stack portion 410 in the case 200.
Such the above-described flow guide unit 700 may include a sealing cover 710, a fan unit 730, a recirculation flow path 720, and a louver 740.
The sealing cover 710 seals a periphery of one surface of the stack portion 410 and an outer periphery of the duct 760 disposed at the air outlet port 230 so that the air passing through the stack portion 410 flows in the direction of the air outlet port 230.
In this case, the sealing cover 710 may be formed of a plurality of plates, and surround one surface of the stack portion 410, and one plate may be connected to an outer periphery of the duct 760 to form a sealed space.
Due to such a sealed space, the air passing through the stack portion 410 flows only in the direction of the duct 760 of the air outlet port 230.
A fixing plate 713 that connects and fixes the side surface of the housing 200 and the sealing cover 710 is disposed in the housing 200 so as to fix the position of the sealing cover 710.
The fixing plate 713 may form a window 713a having a cross-sectional shape of four corners of one surface of the stack portion 410 and one surface of the sealing cover 710. Further, the sealing unit 714 may be disposed along the periphery of the opening window 713a in the direction toward the stack portion 410.
The sealing unit 714 is coupled to the periphery of one surface of the stack portion 410, and air passing through the stack portion 410 flows in the direction of the sealing cover 710 without leaking.
Next, the fan unit 730 is connected to the duct 760 of the air outlet 230. In the present invention, when the fan unit 730 is operated, the air inside the case 200 is discharged to the outside through the air outlet 230, and the inside of the case 200 is relatively under negative pressure or low pressure compared to the outside environment.
If the inside of the case 200 is a negative pressure or a low pressure, external air flows into the inside of the case 200 through the air inlet 220 due to a pressure difference. That is, in the present invention, the fan unit 730 is operated to forcibly form an air circulation environment inside the housing 200.
The fan member 730 may be disposed in a space formed by the duct 760 of the air outlet 230, the sealing cover 710, and the stack portion 410, and thus an air flowing environment in which the air flowing into the air inlet 220 is forced to pass through the stack portion 410 may be formed by discharging the air based on the operation of the fan member 730.
The user controls the rotation speed of the fan unit 730 through the controller to adjust the amount of air flowing into the inside of the case 200 by the pressure difference. As a result, the amount of air supplied to the stack portion 410 is adjusted to control the output of the stack portion 410.
On the other hand, if the fuel cell is stably operated while maintaining high efficiency, it is necessary to maintain an optimum operating environment of the fuel cell stack. Especially, the operational environment temperature is the important factor, and according to the external environment temperature of unmanned aerial vehicle operation, the operational environment temperature that fuel cell piles up receives the influence.
In the case of starting the drone in a cold area such as siberia, north pole, south pole, etc., the temperature difference between the outside and the inside of the housing 200 is great, and the inside temperature of the housing 200 is lowered due to the outside air temperature.
That is, the operating environment temperature of the stack portion 410 disposed inside the housing 200 cannot be maintained at an appropriate temperature. In this case, the internal temperature of the housing 200 needs to be raised to an appropriate temperature.
In contrast, in the case of starting the drone in a hot area such as africa, the middle east, a desert, etc., the temperature difference between the outside and the inside of the housing 200 is great, and the inside of the housing 200 is heated due to the outside air temperature.
That is, the operating environment temperature of the stack portion 410 disposed inside the housing 200 cannot be maintained at an appropriate temperature. In this case, it is necessary to lower the internal temperature of the housing 200 to an appropriate temperature.
Therefore, in order to prevent the outside environment temperature in which the unmanned aerial vehicle operates from rapidly changing, the operating environment temperature of the stack portion 410 may be provided with a recirculation flow path 720 in the hermetic enclosure 710, as shown in fig. 19 a.
After passing through the stack portion 410, a part of the air remaining in the sealing cover 710 passes through the recirculation passage 720 and bypasses and recirculates into the casing 200.
Since the air passing through the stack portion 410 is air cooled by air cooling and maintains a temperature similar to that of the stack portion 410, if a part of the air remaining in the stack portion 410 is recirculated inside the housing 200, the internal temperature of the housing 200 can be adjusted similarly to the operating environment temperature of the stack portion 410.
In the case where the unmanned aerial vehicle is started in a cold area, the internal temperature of the housing 200 may be increased to the operating environment temperature of the stack portion 410, and in the case where the unmanned aerial vehicle is started in a hot area, the internal temperature of the housing 200 may be decreased to the operating environment temperature of the stack portion 410.
That is, the operation efficiency of the stack portion 410 is improved by adjusting the internal temperature of the case 200 to the operating environment temperature of the stack portion 410.
Referring again to fig. 19a, the flow directing unit 700 may also include a recirculation control mechanism 722. The recirculation control mechanism 722 may be disposed in the recirculation flow path 720, so as to control the flow rate of the recirculated air.
The recirculation control mechanism 722 may be an electronically controlled slide type on-off valve or a butterfly type on-off valve, but is not limited thereto.
The user can adjust the degree of opening and closing of the recirculation control mechanism 722 using the controller.
In the case where the outside air temperature is similar to the operating environment temperature of the stack portion 410 and thus the internal temperature of the housing 200 does not need to be adjusted, the user turns off the recirculation control mechanism 722, so that all the air remaining inside the hermetic enclosure 710 is discharged to the outside through the air outlet port 230.
In this case, as will be described below, the louver 740 according to the present invention is disposed to be inclined downward, and thus, when all the air in the sealing cover 710 is discharged to the air outlet 230, it can contribute to the lift component of the flying object.
On the other hand, if the difference between the outside air temperature and the operating environment temperature of the stack portion 410 is large and the internal temperature of the housing 200 needs to be quickly matched to the operating environment temperature of the stack portion 410, the user completely opens the recirculation control mechanism 722 by using the controller.
At this time, since a large amount of air flows into the housing 200 in the sealing cover 710, the internal temperature of the housing 200 can be quickly adjusted to the operating environment temperature of the stack portion 410.
Referring to fig. 19a and 19b again, the louver 740 is disposed in the duct 760 of the air outlet 230 and guides the flowing direction of the flowing air.
The air circulation structure of the fuel cell power pack 100 according to the present invention may cause the air introduced through the air inlet 220 to circulate inside the housing 200 and then be discharged through the air outlet 230, thereby contributing to the formation of the lift of the drone.
Accordingly, referring to fig. 19a, the stack portion 410 may be inclined at a predetermined angle α 1 along a lower direction in the stack receiving portion 920 of the module frame 900.
The sealing cover 710 is also inclined at a predetermined angle α 2 along a lower side of one surface of the stack portion 410.
The fan member 730 is also inclined at a predetermined angle α 3 along a lower direction at the air outlet 230.
The louver 740 is inclined or curved downward so that the air discharged from the air outlet 230 flows downward.
Specifically, the stack receiving portion 920 of the module frame 900 is inclined downward by α 1 with respect to the vertical direction H1, and the stack portion 410 is arranged in an inclined manner in the stack receiving portion 20.
In this case, the inclination angle of the stack portion 410 may be in a range of 5 ° to 15 °, and in the embodiment of the present invention, an inclination angle of about 5 ° may be adopted.
As the stack portion 410 is disposed in an inclined manner, air flowing into the sealed housing 710 through the stack portion 410 flows downward.
On the other hand, the opening window 713a of the fixing plate 713 is coupled to one surface of the stack portion 410 by the sealing unit 714. Since the stack portion 410 is disposed in the stack accommodating portion 920 in a downward inclined manner, the fixing plate 713 is inclined in a downward direction at an inclination angle α 2 corresponding to the stack portion 410.
At this time, the sealing cover 710 may be connected along the periphery of the opening window 713a of the fixing plate 713, and thus, may be basically inclined downward at an angle corresponding to the inclination angle of the stack portion 410. In this case, the inclination angle α 2 of the sealing cover 710 is in the range of 5 ° to 15 °, preferably, about 5 °, as in the stack portion 410.
Although not shown, in another embodiment, the sealing cover 710 is disposed on one surface of the stack portion 410 to be inclined downward within a predetermined angle range.
In this case, the range of the inclination angle α 2 of the sealing cover 710 is larger than the range of the inclination angle of the stack portion 410. For example, the sealing cover 710 may be disposed at an inclination angle in a range of 10 ° to 20 ° with respect to one surface of the fixing plate 713, compared to the stack portion 410.
Next, the air outlet 230 is also disposed substantially downward on the side surface of the housing 200. Accordingly, the fan member 730 also faces downward in the same manner as the air outlet 230.
The fan unit 730 is connected to the hermetic housing 710, and thus, as an embodiment, is disposed to be inclined downward at an angle corresponding to the disposition inclination angle α 2 of the hermetic housing 710. In this case, the inclination angle α 3 of the fan member 730 is in the range of 5 ° to 15 °, preferably about 5 °, as in the case of the sealing cover 710.
In another embodiment, the fan unit 730 is disposed at an inclination angle α 3 greater than the inclination angle α 2 of the sealing cover 710. For example, if the arrangement inclination angle α 2 of the sealing cover 710 is in the range of 5 ° to 15 °, the inclination angle of the fan member 730 is in the range of 10 ° to 25 °.
Or the inclination angle α 3 of the fan member 730 is larger than the inclination angles α 1 and α 2 of the stack portion 410 and the sealing cover 710. For example, if the arrangement inclination angle α 1 of the stack portion 410 is in the range of 5 ° to 15 °, and the inclination angle α 2 of the seal cover 710 inclined more than the stack portion 410 is in the range of 10 ° to 20 °, the inclination angle α 3 of the fan member 730 is in the range of 15 ° to 30 °.
As described above, when the inclination angle of the fan member 730 is greater than the inclination angles of the stack portion 410 and the sealing cover 710, the air flowing in the direction of the air outlet 230 through the stack portion 410, the sealing cover 710, and the fan member 730 smoothly flows downward.
That is, the stack portion 410, the sealing cover 710, and the fan member 730 are arranged at an inclination angle gradually increased according to the flow direction of the air, and the air smoothly flows downward.
On the other hand, louvers 740 are disposed in the air outlet 230 so as to be inclined downward and to form a curvature.
In the unmanned aerial vehicle to which the fuel cell power pack 100 of the present invention is attached, the propeller 213 is disposed above the air outlet port 230. When the propeller 213 is driven by the unmanned aerial vehicle, since the unmanned aerial vehicle is raised by the generation of the lift force due to the rotation of the unmanned aerial vehicle 213, if the louver 740 has a downward inclination direction or a downward curvature direction, the air discharged through the air outlet 230 and flowing downward is in the same flow direction as the outside air flowing downward through the propeller 213 of the unmanned aerial vehicle, thereby contributing to the generation of the lift force of the unmanned aerial vehicle.
The tilt angle angles θ 11 and θ 12 of the louver 740 are inclined downward by 5 ° to 80 °, for example, the tilt angle θ 11 is 5 ° to 45 °, and the tilt angle θ 12 is 30 ° to 80 ° with respect to the horizontal direction H2, in order to form the air passing through the louver 740 so as to contribute to the lift of the propeller 213 type drone. Preferably, the inclination angle θ 11 is about 30 °, and the inclination angle θ 12 is about 60 °.
Referring to fig. 19b, in connection with the arrangement inclination angles α 1, α 2, and α 3 of the stack portion 410, the sealing cover 710, and the fan member 730, in the embodiment of the present invention, basically, the arrangement angle of the stack portion 410, the sealing cover 710, and the fan member 730 is about 5 ° to 15 °, preferably about 5 °.
Of course, as described above, in another embodiment, the stack portion 410, the sealing cover 710, and the fan member 730 are arranged at gradually increasing inclination angles α 1, α 2, and α 3 according to the flow direction of the air.
Accordingly, the air flowing in the direction of the louver 740 through the stack portion 410 gradually flows downward, and the discharge flow of the air smoothly moves in a direction in which a lift force is generated.
The plurality of louvers 740 may be disposed in the duct 760 of the air outlet 230, and the length of the plurality of louvers 740 may be reduced as the air outlet 230 is closer to the lower side.
Referring to fig. 19b, in the case 200, the air outlet 230 is inclined or curved toward the inside of the case 200 from the upper side toward the lower side.
At this time, the length of the louver 740 is also reduced from the upper side to the lower side of the air outlet 230, and the discharged air also flows downward.
The length of the louver 740 is reduced by a predetermined ratio, which corresponds to a ratio angle θ 2 that the air outlet 230 is reduced from the upper side to the lower side.
As the length of the louvers 740 is reduced by a predetermined ratio, the air flow passing through the louvers 740 arranged in a plurality of rows is relatively uniform.
Since the air flows downward, lower louver 742 disposed at the lower portion is shorter than upper louver 741 disposed at the upper portion, and is not hindered by the downward flow.
When the length of the louver 740 is not necessarily reduced but is reduced individually, for example, unlike the case shown in fig. 19b, when the length of one lower louver 742 is longer than that of the upper louver 741 disposed at the upper portion, the lower louver 742 disposed at the lower portion acts as an obstacle in the course of the air passing through the upper louver 741 flowing downward, and mixes with the air discharged along the lower louver 742, thereby generating turbulence at the periphery of the air outlet 230. This can cause the air to be expelled less smoothly and can interfere with the start-up of the drone.
Therefore, it is preferable that the length reduction of the louver 740 is maintained at a predetermined ratio, which is advantageous for the start-up environment of the unmanned aerial vehicle, such as smooth downward discharge of air and formation of an air lift.
That is, the downward inclination angles θ 11 and θ 12 of the louver 740 and the length change of the predetermined proportional angle θ 2 of the louver 740 work together, and the air flowing out is strongly discharged downward. The above-mentioned overlapping structure contributes to the unmanned aerial vehicle's that forms as the lift start environment.
On the other hand, referring to fig. 20a and 20b, another embodiment of the air circulation structure of the fuel cell power pack 100 according to the present invention is such that the louver 740 is disposed obliquely along the lower side of the air outlet 230.
In the unmanned aerial vehicle to which the fuel cell power pack 100 of the present invention is mounted, as described above, the propeller 213 is disposed above the air outlet port 230, and therefore, as the louver 740 is inclined downward, the air discharged from the air outlet port 230 and flowing downward is in the same direction as the flow of the outside air flowing downward through the propeller 213 of the unmanned aerial vehicle, thereby contributing to the lift of the unmanned aerial vehicle.
Here, in order to form the air passing through the louver 740 so as to contribute to the lift of the propeller 213 type drone, the inclination angle θ 3 of the louver 740 is formed to be about 5 ° to 80 ° with respect to the horizontal direction H2, and preferably, the inclination angle θ 3 is about 60 °.
Referring to fig. 20b, when the stack portion 410, the sealing cover 710, and the fan member 730 are inclined at angles α 1, α 2, and α 3, the stack portion 410, the sealing cover 710, and the fan member 730 are basically inclined at an angle of 5 ° to 15 °, preferably about 5 °, in an embodiment of the present invention.
Of course, as described above, in another embodiment, the stack portion 410, the sealing cover 710, and the fan member 730 are arranged at gradually increasing inclination angles α 1, α 2, and α 3 according to the flow direction of the air.
Accordingly, in another aspect of the present invention, since the air flowing in the direction of the louver 740 through the stack portion 410 gradually flows downward, the discharge flow of the air smoothly moves in a direction in which a lift is generated.
[ air supply structure of Fuel cell Power pack ]
Fig. 21 is a plan view showing an air supply structure in the fuel cell power pack of the present invention. Fig. 22 is an enlarged view of the portion N shown in fig. 20. Fig. 23 is a perspective view showing a first embodiment of the structure of the pressurizing unit of the present invention. Fig. 24a is a perspective view showing an aspect of the second embodiment of the pressing unit structure of the present invention. Fig. 24b is a perspective view showing another aspect of the second embodiment of the pressing unit structure of the present invention. Fig. 25 is a sectional view showing the structure of the air supply unit of the present invention. Fig. 26 is an enlarged view of a portion H shown in fig. 24. Fig. 27 is a sectional view showing the arrangement structure of the flow control valve of the present invention.
Referring to fig. 23 to 27, the air supply structure of the fuel cell power pack 100 according to the present invention may include an air supply unit 430 and a pressurizing unit 480.
The air supply unit 430 is connected to the control valve 320 of the air tank 300 inserted into the housing 200, and is disposed in the front surface portion 201 of the housing 200 so as to supply air to the stack portion 410 disposed in the housing 200.
One side of the pressurizing unit 480 is fixed to the inside of the front surface 201 of the housing 200, and the other side is connected to the air supply unit 430, so that the air supply unit 430 is pressurized in the direction of the control valve 320.
Such the above-described pressing unit 480 may include a first plate 481, a second plate 483, a pressing elastic body 487, and a guide shaft 488.
The first plate 481 may be fixed to the inside of the front surface 201 of the case 200, and the second plate 483 may be connected to the air supply unit 430.
For the first plate 481 and the second plate 483, materials such as reinforced plastic, carbon, titanium, and aluminum are used for weight reduction.
The first plate 481 or the second plate 483 is formed with a cutting groove 485 in a honeycomb (honeycomb) shape to reduce the weight.
The pressure elastic body 487 may be disposed between the first plate 481 and the second plate 483. The guide shaft 488 is fixed to the first plate 481, is connected to a hole penetrating the second plate 483, and supports movement of the second plate 483. A beam bushing 486 is disposed in a hole of the second plate 483 to smoothly flow the guide shaft 488.
The guide shaft 488 may be made of a metal material, and in this case, a lubricant may be applied to the beam sleeve 486 for smooth operation of the guide shaft 488.
Referring to fig. 23, 25 and 26, a first embodiment of the structure of the pressurizing unit 480 according to the present invention is shown. In the first embodiment, the first plate 481 is provided with the first projecting portion 482, the second plate 483 is provided with the second projecting portion 484, and the pressure elastic body 487 is disposed between the first projecting portion 482 and the second projecting portion 484. In this case, only one of the pressure elastic bodies 487 is disposed between the first plate 481 and the second plate 483.
Referring to fig. 24a, a second embodiment of the structure of the pressurizing unit 480 according to the present invention is shown. In one mode of the second embodiment, the pressure elastic body 487 may be disposed on the guide shaft 488 between the first plate 481 and the second plate 483. In the present invention, the first plate 481 and the second plate 483 have a triangular shape, and the pressure elastic bodies 487 are disposed on the three guide shafts 488 disposed at the edges of the first plate 481 and the second plate 483, respectively.
Referring to fig. 24b, another aspect of the second embodiment of the structure of the pressurizing unit 480 according to the present invention is disclosed. In another aspect of the second embodiment, the first plate 481 and the second plate 483 are formed in a quadrangular shape in consideration of weight balance. The pressure elastic bodies 487 are disposed on the 4 guide shafts 488 disposed on the edges of the first plate 481 and the second plate 483, respectively. In this case, the pressurizing force is further increased.
Next, a stopper 489 may be disposed at an end of the guide shaft 488 to prevent the second plate from being separated from the guide shaft 488. When the adjustment valve 320 of the gas tank 300 is separated from the gas supply unit 430, the second plate 483 is pushed by the elastic force of the pressure elastic body 487, and at this time, the second plate 483 is caught by the stopper portion 489 and prevented from being detached.
On the other hand, referring to fig. 22, in the embodiment of the present invention, the first plate 481 and the second plate 483 have a polygonal plate shape, the plurality of guide shafts 488 are disposed at edges of the first plate 481 and the second plate 483, and a weight center is located on a center line P of the housing 200 in the first direction V1.
In the present invention, the stack portion 410, the gas tank 300, and the auxiliary power supply portion 500 are disposed in a weight-balanced manner with respect to the center line P of the entire first direction V1.
Therefore, the pressurizing units 480 are also preferably arranged symmetrically on both sides with respect to the center line P of the first direction V1, so that the weight of the fuel cell power pack 100 is balanced.
Specifically, the first plate 481 and the second plate 483 are symmetrical along both sides with respect to the center line P of the housing 200 in the first direction V1, and the guide shafts 488 are arranged in a plurality of symmetrical positions.
In an embodiment of the present invention, the first plate 481 and the second plate 483 have a triangular plate shape, the guide shafts 488 are provided at three edges of the first plate 481 and the second plate 483, respectively, one guide shaft 488 of the three guide shafts 488 is positioned on a first direction center line of the housing 200 for weight balance, and the other two guide shafts 488 are disposed at positions symmetrical to each other about the first direction of the housing 200.
Although not shown, in another embodiment of the present invention, the first plate 481 and the second plate 483 have a circular plate shape, the guide shafts 488 are disposed along the peripheries of the first plate 481 and the second plate 483 at predetermined intervals, and the weight center is located on the center line P of the housing 200 in the first direction V1.
In this case, the centers of the first plate 481 and the second plate 483 are positioned on the first direction V1 center line P of the housing 200, and the guide shafts 488 are symmetrically arranged on both sides with respect to the first direction V1 center line P in the same number.
With the above-described structure, the pressurizing unit 480 of the present invention can apply pressure to the air supply unit 430 in the direction of the regulating valve 320 when the regulating valve 320 of the air tank 300 is inserted into the air supply unit 430, thereby firmly coupling the regulating valve 320 and the air supply unit 430.
This blocks gas leakage by preventing the regulating valve 320 and the gas supply unit 430 from being disengaged during gas supply.
Also, as described above, the gas tank 300 is fixed to the gas tank attachment/detachment portion 210 by the fixing member 250. When the user alternates gas tank 300, if fixing member 250 is released, gas tank 300 is pushed outside gas tank attaching/detaching portion 210 by the rebound pressure of pressurizing elastic body 487, and thus the user simply and quickly alternates gas tank 300 by a simple operation of releasing fixing member 250.
Next, referring to fig. 22, 25, and 26, the gas supply unit 430 is connected to the control valve 320 of the gas tank 300 inserted into the housing 200, and is disposed at the front surface portion 201 of the housing 200 so as to supply gas to the stack portion 410 disposed inside the housing 200.
Such the air supply unit 430 may include a manifold block 450 and an air supply pipe 440. The manifold block 450 may be a portion connected to the adjustment valve 320 of the gas tank 300, and the gas supply pipe 440 may be a portion connected to and disposed between the manifold block 450 and the stack portion 410.
The manifold block 450 may be located at a center line P of the housing 200 in the first direction V1 for weight center. That is, the manifold block 450 has a bilaterally symmetrical shape with respect to the center line P of the first direction V1.
As described above, gas tank 300 is disposed on center line P in first direction V1 of outer shell 200, and a plurality of stack portions 410 are disposed inside outer shell 200 at symmetrical positions along both sides of gas tank 300.
In this case, the air supply pipes 440 are branched from the manifold block 450 by the number corresponding to the plurality of stack portions 410, and the plurality of air supply pipes 440 are disposed at symmetrical positions or shapes on both sides of the housing 200 with respect to the center line P of the first direction V1.
The gas supply pipe 440 may be connected to an upper side of the stack portion 410. This is to supply gas from the upper side to the lower side of the stack portion 410, and to diffuse in the lower direction to cause an electrochemical reaction.
When oxygen and hydrogen are electrochemically reacted, condensed water is produced as a by-product, and the condensed water falls downward by gravity.
In the case where the gas supply pipe 440 is connected to the middle or lower side of the stack portion 410, the condensed water may be dropped to prevent the diffusion of the gas.
On the other hand, the regulator valve 320 is connected to an outlet of the gas tank 300, and the gas flowing out of the gas tank 300 is supplied under reduced pressure along the manifold channel 456 of the manifold block 450. The gas tank 300 may discharge hydrogen gas.
The control valve 320 may include a connection portion 325 and an opening/closing portion 330.
The connection portion 325 is connected to an outlet port of the gas tank 300. At this time, the outlet port of gas tank 300 is connected by a bolt and screw connection structure, but is not limited thereto.
Referring to fig. 22, 23, 25, and 26, the pressure reducing unit 323, the inflator 321, the pressure sensor 322, and the temperature-responsive pressure discharge unit 324 may be disposed at the connection portion 325.
The decompression unit 323 adjusts the degree of decompression of the gas flowing out of the outlet of the gas tank 300.
The gas filling portion 321 is in a valve state to fill the gas tank 300 with gas. Instead of separating gas tank 300, the user simply inflates gas by opening lead 204 of outer shell 200 and connecting an external gas supply device to gas-filled portion 321 via a hose.
The pressure sensor 322 measures the internal air pressure of the gas tank 300. The internal air pressure of the gas tank 300 may vary according to the working environment, and depending on the circumstances, the internal air pressure of the gas tank 300 may reach a critical value to cause explosion.
For example, a drone operating in a hot area may be started in a high temperature state, in which case the internal air pressure of the gas tank 300 described above may be raised by a high temperature. At this time, the pressure sensor 322 measures the internal air pressure of the gas tank 300 and transmits the information to the user.
The temperature-responsive pressure discharge unit 324 automatically discharges the internal air pressure of the gas tank 300 in response to the internal air temperature of the gas tank 300. The gas tank 300 is exposed to a high temperature environment, and when the internal pressure of the gas tank 300 increases and the internal pressure of the gas tank 300 reaches a threshold value, gas is automatically discharged to prevent an explosion accident of the gas tank 300 in advance.
Next, referring to fig. 25 and 26, one end of the opening/closing unit 330 is connected to the connection unit 325, and the other end is inserted into the insertion space 452 of the manifold block 450 to open and close the flow of gas.
The opening/closing part 330 may include a valve body 334 having an internal flow path 332 and a dispersion flow path 333, a valve elastic body 337, and an opening/closing lever 336.
The valve body 334 has a substantially cylindrical shape and is insertable into an insertion space 452 formed inside the manifold block 450. The valve body 334 may be connected to the connection portion 325 at one side thereof and may be formed with a valve protrusion portion 335 having a central portion protruding in a direction of the manifold block 450 at the other side thereof.
The valve protrusion 335 may have a cylindrical shape. The valve protrusion 335 has a diameter smaller than that of the valve body 334 connected to the connection portion 325.
The internal flow path 332 is connected to the connection portion 325 and is disposed inside the valve body 334. The internal flow path 332 may be a flow path through which the hydrogen gas depressurized to the pressure set in the depressurizing unit 323 flows in the connecting unit 325.
The internal flow path 332 includes an open/close space 331 formed at the other side of the valve body 334 and expanding in the radial direction.
In the dispersion flow path 333, the inside of the valve protrusion 335 of the valve main body 334 may communicate with the internal flow path 332.
The dispersion flow path 333 is formed in the radial direction inside the valve protrusion 335, and disperses the gas in the radial direction. The dispersion flow path 333 may be formed in plural along the circumferential direction of the valve protrusion 335.
The hydrogen gas flowing out of the dispersion flow path 333 flows into a manifold flow path 456 of the manifold block 450, which will be described later, and is supplied to each stack portion 410 through the gas supply pipe 440.
The valve elastic body 337 may be disposed in the open/close space 331. The valve elastic body 337 suitable for the present invention may be a coil spring or a plate spring.
The valve elastic body 337 applies an elastic force to the opening/closing lever 336 so that the opening/closing lever 336 applies a pressure in the direction of the pressing portion 460 of the manifold block 450.
The one end 336a of the opening/closing lever 336 is supported by the valve elastic body 337 and can be disposed in the opening/closing space 331 of the internal flow path 332.
The other end 336b of the opening/closing lever 336 is disposed in the through hole 335a formed in the valve protrusion 335 and protrudes along the pressing portion 460 of the manifold block 450.
Next, the manifold block 450 is connected between the adjustment valve 320 and the stack portion 410, and the gas discharged through the adjustment valve 320 flows into the stack portion 410.
The manifold block 450 may include a body portion 451, a connecting portion 455, and a pressing portion 460.
The body portion 451 may have a cylindrical shape as a whole, and an insertion space 452 having a shape corresponding to the adjustment valve 320 may be formed at one side portion.
The insertion space 452 may include a valve protrusion receiving hole 453 positioned in a center line direction of the insertion space 452 and receiving the valve protrusion 335 of the valve body 334.
The valve body 334 and the valve protrusion 335 may be inserted into the insertion space 452 and the valve protrusion receiving hole 453. The insertion space 452 and the valve protrusion receiving hole 453 are shaped to accommodate the valve body 334 and the valve protrusion 335, respectively.
The connecting portion 455 is disposed at the other side of the body portion 451. The connecting portion 455 may be provided with a manifold passage 456 through which gas discharged from the control valve 320 inserted into the insertion space 452 flows into the stack portion 410.
The number of the manifold channels 456 is equal to the number of the stack portions 410 for supplying hydrogen gas, and a plurality of the manifold channels 455 are formed.
Next, the pressing portion 460 is in contact with the other end portion 336b of the opening/closing lever 336 inside the main body portion 451, and presses the opening/closing lever 336.
The pressing portion 460 may be in the form of a groove (groove) that can receive a part of the other end portion 336b of the opening/closing lever 336.
Although not shown in the drawings, in another embodiment of the present invention, the pressing portion 460 has a protrusion shape.
In this case, the other end 336b of the opening/closing lever 336 is positioned inside the through hole 335a, and when the valve protrusion 335 is completely inserted into the insertion space 452 of the body portion 451, the protruding shape of the pressing portion 460 is inserted into the through hole 335a, and pushes the other end 336b of the opening/closing lever 336.
Thereby, the one end 336a of the opening/closing lever 336 is separated from the contact surface of the opening/closing space 331 to open the internal flow path 332 and the dispersion flow path 333.
Although the opening/closing part 330 as a part of the control valve 320 is inserted into the manifold block 450 (accurately, into the insertion space 452) as described above, in another embodiment of the present invention, the form in which the manifold block 450 is inserted into the control valve 320 may be changed as appropriate.
Next, in an embodiment of the present invention, a first sealing part 471 is disposed on an outer surface of the valve body 334 so as to prevent gas leakage between an inner surface of the insertion space 452 and the outer surface of the valve body 334.
Further, a second sealing part 473 disposed on an outer surface of the valve protrusion 335 may be provided to prevent gas leakage between the valve protrusion 335 and an insertion coupling surface of the manifold block 450 between the valve protrusion receiving hole 453.
The first and second sealing portions 471 and 473 may be O-rings, but are not limited thereto.
At least one of the first sealing part 471 and the second sealing part 473 may be formed of an elastic material. For example, the first sealing part 471 and the second sealing part 473 may be formed of a material such as rubber or soft plastic.
The first sealing part 471 is press-fitted between the outer circumferential surface of the valve body 334 and the inner circumferential surface of the insertion space 452 of the manifold block 450, so that the valve body 334 and the manifold block 450 are press-fitted.
The second sealing part 473 is pressed between the outer circumferential surface of the valve protrusion 335 of the valve main body 334 and the inner circumferential surface of the valve protrusion receiving hole 453 of the manifold block 450, so that the valve protrusion 335 of the valve main body 334 is pressed against the manifold block 450.
That is, the valve body 334 and the manifold block 450 may contribute to improvement of sealing force for preventing gas leakage by the first and second sealing parts 471 and 473 and maintain the coupling by applying a pressure contact force.
On the other hand, referring to fig. 27, the present invention further includes a flow control valve 490 disposed in the manifold passage 456 to control gas discharged from the control valve 320 to the manifold passage 456.
The flow control valve 490 may be an electronic control valve such as a solenoid valve, and the flow rate of the gas supplied to the stack portion 410 is controlled by the user through the flow control valve 490 in the manifold flow path 456 by power supply control.
In an embodiment of the present invention, a center hole 457 into which the valve protrusion 335 is inserted may be formed at a center portion of the manifold block 450. The gas discharged from the through hole 335a of the valve protrusion 335 is discharged to the center hole 457 through a plurality of dispersion flow paths 333 arranged along the circumference of the valve protrusion 335, and the gas flowing into the center hole 457 is dispersed to the manifold flow path 456 through branch holes 458, respectively.
In this case, the flow control valve 490 may include a valve housing 491, a stator 492, a rotor 493, and an opening/closing bolt 494. The valve housing 491 is disposed below the manifold block 450, a stator 492 is disposed inside the valve housing 491, a rotor 493 is disposed on the center side of the stator 492, and an opening/closing bolt 494 is attached to an end of the rotor 493.
In the present invention, the flow control valve 490 may be a normally closed (normal close) type valve which is always in a sealed state. In this case, the valve is opened when the user applies power.
That is, when the user applies power while the opening/closing bolt 494 is substantially inserted into the branch hole 458, the rotor 493 is moved in the direction opposite to the branch hole 458 by an electromagnetic reaction. Accordingly, the opening/closing bolt 494 attached to the end of the rotor 493 is discharged from the branch hole 458, and the opening/closing of the branch hole 458 is adjusted.
When the user stops using the fuel cell power pack and turns off the power supply, the rotor 493 moves again in the direction of the branch hole 458, and the opening/closing bolt 494 is inserted into the branch hole to interrupt the flow of hydrogen gas.
In the present invention, the flow control valve 490 may be automatically closed when a failure or a dangerous situation occurs in the fuel cell power pack.
In the present invention, the flow control valve 490 is described as an electronic control valve, but is not limited thereto.
The flow control valve 490 is an auxiliary unit that controls the flow of hydrogen gas together with the opening/closing lever 336.
For example, when the opening/closing lever 336 is damaged or worn by external impact or long-term use, and thus the gas cannot be smoothly opened or closed, the flow control valve 490 controls the opening and closing of the gas by assisting the opening and closing of the branch hole 458.
Since the hydrogen gas used in the present invention is a combustible material, the supply of the gas can be controlled more stably by the first opening and closing structure of the opening and closing lever 336 and the pressing part 460 and the second opening and closing structure of the flow control valve 490 and the branch hole 458, as described above.
As described above, the air supply structure according to the present invention will be described below with reference to fig. 25 to 27 as an opening and closing system based on the above structure.
When the user inserts gas cylinder 300 into gas cylinder attachment/detachment portion 210 of outer case 200, regulating valve 320 coupled to gas cylinder 300 is caught by manifold block 450 of gas supply unit 430.
When the valve body 334 of the adjustment valve 320 is inserted into the insertion space 452 of the manifold block 450, the other end 336b of the opening/closing lever 336 comes into contact with the inner end of the pressing portion 460.
As shown in fig. 26, when the valve body 334 is pushed more strongly into the insertion space 452, the other end 336b of the opening/closing lever 336 is pressed by the inner end of the pressing part 460, the one end 336a of the opening/closing lever 336 is separated from the contact surface 331a of the opening/closing space 331, and the flow path through which the gas flows is opened.
That is, one end 336a of the opening/closing lever 336 moves in the opening/closing space 331 in the direction of the internal flow path 332, and the internal flow path 332 and the through hole 335a communicate with each other.
At this time, a flow path is formed in which gas flows through a space between the contact surface 331a of the opening/closing space 331 and the one end portion 335a of the opening/closing lever 336. Thereby, the internal flow path 332, the open/close space, and the dispersion flow path 333 communicate with each other, and the gas in the internal flow path 332 flows into the dispersion flow path 333.
As described above, with the opening of the flow path through which gas can flow, the gas discharged from the gas tank 300 is first reduced in pressure to a predetermined pressure by the pressure reduction unit 323 of the regulator valve 320, and then flows in the direction of the internal flow path 332.
Since the internal flow path 332 and the dispersion flow path 333 communicate with each other by the movement of the opening/closing lever 336, as shown in the enlarged view of fig. 26, the gas is discharged through the dispersion flow path 333 via the opening/closing space 331 in the internal flow path 332, and flows into the manifold flow path 456.
Then, air is supplied to each stack portion 410 through the air supply pipe 440 connected to the manifold passage 456.
In this case, the first and second sealing parts 471 and 473 are disposed between the outer surface of the valve main body 334, the outer surface of the valve protrusion 335, and the inner surface of the insertion space 452, thereby preventing leakage of hydrogen gas.
At this time, if it is necessary to replace or interrupt the gas tank 300, the worker takes out the valve body 334 of the regulator valve from the insertion space 452 of the manifold block 450.
In this case, the restoring force of the valve elastic body 337 is generated, the opening/closing lever 336 is pushed toward the pressing part 460, and the one end 336a of the opening/closing lever 336 is coupled to the contact surface 331a of the opening/closing space 331.
Thereby, the connection between the internal flow path 332 and the dispersion flow path 333 is disconnected, and the supply of air to the manifold flow path 456 is interrupted.
Of course, the user turns off the power to close the branch hole 458 through the flow control valve 490 as described above, whereby the supply of air can be cut off. In this case, the user need not remove gas canister 300 from housing 200.
The first opening and closing structure by the opening and closing lever 336 and the pressing part 460 and the second opening and closing structure by the flow control valve 490 and the branch hole 458, that is, the two-step gas flow control, have a stable gas supply system.
The above discussion shows only a specific embodiment of a fuel cell power pack.
Therefore, those skilled in the art to which the present invention pertains can make various substitutions and modifications without departing from the spirit of the present invention described in the claims.
Industrial applicability of the invention
The present invention relates to a fuel cell power pack for an unmanned aerial vehicle, and has industrial applicability.
Claims (21)
1. A fuel cell power pack, comprising:
a housing;
a gas tank disposed in a gas tank attachment/detachment portion formed in the housing; and
and a fuel cell unit disposed inside the housing so as to be weight-balanced with the gas tank.
2. The fuel cell power pack of claim 1,
the fuel cell unit includes:
a manifold part connected with a regulating valve, wherein the regulating valve is combined with the gas tank; and
and a stack portion connected to the manifold portion for receiving the fuel gas.
3. The fuel cell power pack of claim 2,
the manifold portion and the stack portion are disposed in a weight-balanced manner with respect to a second direction (V2) of the housing with respect to a center line (P) of the housing in a first direction (V1).
4. The fuel cell power pack of claim 3,
the manifold portion is disposed on the inner front surface portion of the housing, and the stack portion is disposed in plural and at symmetrical positions on both sides of the interior of the housing.
5. The fuel cell power pack of claim 2,
the gas tank and the stack portion form a weight balance with respect to a second direction (V2) of the housing, with reference to a center line (P) of the housing in the first direction (V1).
6. The fuel cell power pack of claim 5,
the stack portion is disposed in the housing.
7. The fuel cell power pack of claim 6,
the gas tank and the plurality of stacks are weight-balanced with respect to a second direction (V2) of the housing, with respect to a center line (P) of the housing in the first direction (V1).
8. The fuel cell power pack of claim 7,
the gas tank is disposed on a first direction (V1) center line (P) of the housing.
9. The fuel cell power pack of claim 8,
the plurality of stacking portions are disposed at symmetrical positions with respect to the gas tank on both side portions of the housing.
10. The fuel cell power pack of claim 2,
the fuel cell system includes an auxiliary power supply unit disposed inside the casing, connected in parallel to the fuel cell unit, and configured to supply auxiliary power.
11. The fuel cell power pack of claim 10,
the auxiliary power supply units are arranged at symmetrical positions with respect to a center line (P) of the housing in a first direction (V1).
12. The fuel cell power pack of claim 11,
a plurality of stack portions are disposed in the housing,
the plurality of stack portions and the plurality of auxiliary power supply portions are balanced in weight with respect to a second direction (V2) of the casing with respect to a center line (P) of the casing in the first direction (V1).
13. The fuel cell power pack of claim 2,
and a discharging part formed on the inner lower surface of the casing, for collecting and discharging the condensed water discharged from the stack part or the condensed water generated by condensing the outside air in the casing.
14. The fuel cell power pack of claim 13,
the discharge unit includes:
a drainage groove formed by the concave of the lower surface of the inner side of the shell;
a first drain pipe connected to a lower portion of the stack portion and disposed in the drain tank to drain condensed water discharged from the stack portion to the outside; and
and a second drain pipe disposed in the drain tank, for discharging condensed water generated by condensation of external air in the casing to the outside.
15. The fuel cell power pack of claim 13,
the discharge unit includes:
a drainage groove formed by the concave of the lower surface of the inner side of the shell; and
and a drain port disposed in the drain tank, the drain port having a slit hole formed therein, so that condensed water condensed in the drain tank is condensed and discharged.
16. The fuel cell power pack of claim 15,
the drain unit includes a humidifying unit disposed in the drain tank, and evaporates the condensed water condensed in the drain tank to form a humidified environment in the casing.
17. The fuel cell power pack of claim 16,
the humidifying unit is a heating coil, an ultrasonic humidifying sensor or a natural convection humidifier.
18. The fuel cell power pack of claim 1,
the gas tank attaching/detaching portion includes:
an insertion hole formed in a rear surface portion of the housing for inserting the gas tank; and
and a fixing member disposed around the insertion hole and fixing the gas tank.
19. The fuel cell power pack of claim 18,
the fixing member includes:
a block fixed to an inner surface of the housing and having a moving groove formed therein;
a moving block which forms a guide rod inserted into the moving groove and is connected with the block body;
a fixed rod connected with the movable block through a connecting rod and assembled and disassembled in an insertion groove of the gas tank; and
and a coil spring disposed between an inner surface of the block and an inner space of the guide rod.
20. The fuel cell power pack of claim 19,
the fixing member includes:
a guide groove formed in the block; and
and a guide projection disposed on the moving block and inserted into the guide groove.
21. The fuel cell power pack of claim 20,
the fixing member includes:
a fixing bolt disposed on the block; and
and a fixing groove configured on the moving block and used for inserting the end part of the fixing bolt.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2018-0103813 | 2018-08-31 | ||
| KR1020180103813A KR102130212B1 (en) | 2018-08-31 | 2018-08-31 | Fuel cell power pack |
| PCT/KR2019/010863 WO2020045930A1 (en) | 2018-08-31 | 2019-08-26 | Fuel cell power pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112640174A true CN112640174A (en) | 2021-04-09 |
Family
ID=69644600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980056074.8A Pending CN112640174A (en) | 2018-08-31 | 2019-08-26 | Fuel cell power pack |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US11831049B2 (en) |
| EP (1) | EP3846266A4 (en) |
| JP (1) | JP7257502B2 (en) |
| KR (1) | KR102130212B1 (en) |
| CN (1) | CN112640174A (en) |
| AU (1) | AU2019329639B2 (en) |
| CA (1) | CA3110061A1 (en) |
| WO (1) | WO2020045930A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD934957S1 (en) * | 2019-02-27 | 2021-11-02 | Doosan Mobility Innovation Inc. | Fuel cell power pack for drone |
| KR102426064B1 (en) | 2020-11-20 | 2022-07-29 | 에스아이에스 주식회사 | Automated guided vehicle with a hydrogen fuel cell power pack with separate stack and controlle |
| KR102426068B1 (en) | 2020-11-24 | 2022-07-29 | 에스아이에스 주식회사 | Automated guided vehicle with a hydrogen fuel cell power pack |
| US20230088830A1 (en) * | 2021-09-17 | 2023-03-23 | HyDaaS Inc. | Hydrogen drone carrying vehicle with hydrogen refueling system and communication system |
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Also Published As
| Publication number | Publication date |
|---|---|
| US11831049B2 (en) | 2023-11-28 |
| JP7257502B2 (en) | 2023-04-13 |
| AU2019329639B2 (en) | 2022-12-15 |
| EP3846266A4 (en) | 2022-12-14 |
| KR20200025858A (en) | 2020-03-10 |
| AU2019329639A1 (en) | 2021-03-11 |
| US20210249670A1 (en) | 2021-08-12 |
| WO2020045930A1 (en) | 2020-03-05 |
| CA3110061A1 (en) | 2020-03-05 |
| EP3846266A1 (en) | 2021-07-07 |
| KR102130212B1 (en) | 2020-07-03 |
| JP2021535563A (en) | 2021-12-16 |
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